7 Tesla MPRAGE imaging of the intracranial arterial vasculature: nonenhanced versus contrast-enhanced. - Umutlu L; Theysohn N; Maderwald S; Johst S; Lauenstein TC; Moenninghoff C; Goericke SL; Dammann P; Wrede KH; Ladd ME; Forsting M; Schlamann M (Academic radiology, 2013)